I'm startting to think I should do something about my tangle addiction. I must have spent a total of about five hours on things yesterday! I had a blast using my new Prismacolours. First I coloured the waiting room tangle and then I had a go on black. I used a uni-ball signo pigment ink pen. It was broad so flowed nicely, but I need to get a finer one.The Pigmas were great on black and showed up ok, though could be better with larger areas of pattern maybe. Hope you like them.